Winter cold impacts on EAB: Minnesota data

By Eli Sagor, University of Minnesota Extension A few weeks ago the local and national media ran a number of hopeful stories about the effect of this year’s deep cold on EAB larvae overwintering under ash bark. We got in on it too: Will winter cold save us from emerald ash borer? Sensing perhaps a bit too much optimism, last week Dr. […]

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The Road to a Thoughtful Street Tree Master Plan Slideshow Series (2011)

A new resource, years in the making By Sean Peterson Several years ago, arborist Ken Simons and University of Minnesota Prof. Gary Johnson first set out to define what practical information Minnesota communities needed to develop a step-by-step practical “Master Plan” for street tree planning and design. After much research, compilation of available resources, discussion, planning and finally implementation, in […]

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Summary of storm damage to urban trees in Minnesota

Data Collection Forty-two (42) tree species were documented as damaged by wind and/or ice loading events in Minnesota between March, 1995, and October, 2005.   One thousand five hundred eighty-four (1584) individual sample units (damaged trees) were examined and the following data was collected from each sample unit: date damaged location (community/address) siting (lawn, blvd., etc) species size type of storm* […]

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Planting depth study

Effects of Various Planting Depths on Tree Health and Root Systems By Katie Frerker Study Background Since 1994, a number of different studies have been performed that looked at the correlation between depth of soil over roots and the health of trees and root systems. The results showed that soil depths of more than 1 inch over the first main […]

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Nicollet Island brownfield study

Summary of data Principal Investigators: Gary Johnson, Jeff Gillman, Harold Pellett, Chad Giblin, Dave Hanson, Patrick Weicherding.  University of Minnesota. October 2000 through July, 2006 Introduction In October, 2000, 186 trees representing 15 different species were planted in a randomized block design on Nicollet Island, Minneapolis, Minnesota.  The purpose of our study was to evaluate tree performance over a three-year […]

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